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Statistics

Formula Review

StatisticsFormula Review

12.1 Linear Equations

y = a + bx, where a is the y-intercept and b is the slope. The variable x is the independent variable and y is the dependent variable.

12.3 Testing the Significance of the Correlation Coefficient (Optional)

Least-Squares Line or Line of Best Fit:

ŷ =a+bx , ŷ =a+bx ,

where a is the y-intercept and b is the slope.

Standard Deviation of the Residuals:

s= SSE n2 , s= SSE n2 ,

where SSE = sum of squared errors, and

n = the number of data points.

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